D-lysergic acid diethyl amide



Patented Mar. 23, 1948 d-LYSERGIC ACID DIETHYL AMIDE Arthur Stoll'and Albert Hofmann, Basel, Switzerland, assignors zerland, a Swiss N Drawing. Application to Sandoz firm Ltd., Fribourg, Swit- April 28, 1944, Serial In Switzerland April 30, 1943 1 Claim. (Cl. 260236) preparation.

It has been found that by condensing azides of dor d,l-lysergic acid respectively or of dor d,lisolysergic acid respectively or mixtures of these compounds, with dialkyl amines, d-lysergic the dialkyl amines ined consisting of d-Iysergic acid diethyl amide and of d-isolysergic acid diethyl amide, from which mixture the d-lysergic acid derivative will be separated. By using as starting product d-isolysergic acid azide and diethyl amine, a mixture of d-lysergic acid diethyl amide and of d-isolysergic will be obtained, this mixture acid azide or from racemic isolysergic acid azide, mixtures consisting of d,l-lysergic acid diethyl amide and d,l-isolysergic acid diethyl amide will be obtained, from which the d-lysergic acid diethyl amide can be separated in a suitable manner, e. g., in form of its tartaric acid salt.

The following examples, without being limitative, illustrate the present invention, the parts being by weight.

Ewample 1 3 parts of d-isolysergic acid hydrazide are transformed in the usual way .in a hydrochloric acid solution by a treatment is shaken out by means of 300 parts of ethyl ether.' The ethereal solution is then dried with freshly calcinated potassium carbonate and treated sesses the specific rotation of [a] =ab0l1t+10O (in pyridine) and consists essentially of a mixture of nearly equal parts of d-lysergic acid diethyl amide and d-isolysergic acid diethyl amide.

column of aluminium oxide of cm. length and 4 cm. radius and the chromatogram developed with the same solvent. The dark impurities pass rapidly into the filtrate.

parts of this product will A further slowly passing portion of the solution contains the d-isolysergic acid diethyl'amide.

parts of a compound crystallising in beautiful prisms of melting point 182 0. (corn) under decomposition is obtained, this compound being the pure d-isolysergic acid diethyl amide. Its specific rotation is [a] =+217 (0:0.4 in pyridine). lowing values: 0 74.41; H 7.48; N 13.27%. The calculated values for d-isolysergic acid diethyl amide, i. e., C2oH25ON3, 13.00%.

be produced after a short time. The d-lysergic acid diethyl amide can then be separated from the mixture in the manner described above.

are C 74.25; H 7.79; N

' acid .diethyl amide The amorphous d-lysergic acid diethyl amide, which can be separated by the chromatographical Elementary analysis gives method, crystallizes, by dissolving it in a small one equivalent or d-tartaricacid in a small quantity of methanol the neutral tartrate of d-lysergic crystallizes out in form of bundles of needles. The-salt is very easily soluble in waterand melts .undi'stinctly andunder decompositiomat 200 T(corr.)..

' Example .12

ethereal solution or d-lysergic acid azide,

prepared imtheusual-manner irom 3parts of dlysergic acid hydrazide, is treatedwith 3 parts ofgdiethy-l amine and allowed to stand for 24 hours in the dark and'uat'room temperature with occasional shaking. The pound'thusiproduced is carried out in the manner described ,inthefExample .l. The first separation 'bybmeans ;of the chromatographicaladsorption yields113*to1.7 parts of d-lysergic acid diethyl amide .andabout 10.5 to 0.8part of d-isolysergic acid diethyl amide.

v;-E:rra11z4fle 3 3 parts of racemicisolysergic acid hydrazide are transformed in the usual manner into the respective azide and the formed compound is precipitated by meansof an excess of a sodium oi-'- carbonate solution in'the form of voluminous yellowish'flocks,which are separated by suction and immediately introduced at. -5 C. into a solution of *3 parts of diethyl amine in 30 parts of ethanol. The azide readily dissolves in the solution-which becomes brown andis then ""heated slowly to 30 C. The solution is maintained at this-temperature for '1 hour, 'whereupon'the-solvent is evapisolation of the com- .is separated thy .o'f raceniic ,isolysergic into *its-neutral tartaric orated in vacuo. with 30 parts of water and filtered. The raw condensation product amounting to about 2.8 parts consists of racemic isolysergic acid diethyl amide and of racemic lysergic acid diethyl' amide and the chromatogeaphical method in the @manner gdescribed iinExample '11. Durin the chromatographical separation two zones are obtained which are colored, in ultra-violet light, in brilliant-blue shades. The more rapidly passing zone contains the racemic lysergic acid diethyl amide, whereas .theslower passing zone consists acid diethyl amide.

:From rthezracemic lysergic acid diethyl amide the d-lysergic amide moi.)

.On'jnoculation with d-lysergic acid .diethy-l.

:amideitartrate'this compound crystallizes out in i .Yield.1.0 to v 1.2 parts. .The properties-of.thecompound thus nearly colorless Joundles of needles.

obtained zaresidentical .withtthose .described in Example 1 iorathe .neutrald-tartaric .acid salt ,cultly soluble .in water but .easilyseluble. inQmethwhich possesses the .spe: cific rotation'lal Q=130 '(c.-=IOAin.pyridine) and anol and in ethanol,

which corresponds to the formula :CzcHzsONs.

ARTHUR STOLL. .ALBERT HOEMANN.

"REFERENCES ZCITED The following references are not record iinith'e file oithispatent:

v V UNITEDSTA'IES PATENTS Number :Name Date 2,090,430 Stoll etal. :Aug.-11"'Z, :1-930 2,265,207 Stol-l-et ;al... zDec. 19, 9.41 2,265,217

.StelL et 131'- The sticky residue is triburated I acid ,diethyl amide can be separated by transfornimg the same for instance acid salt. For this pu'rpose .312 parts of racemic lysergic acid diethyl ll are dissolved in 6 parts of methanol and addedtoasolution 01E .0.-'Z5-part;of detartaflc acid 1 /200 moi.) ,in 2,par.ts of methanol. J

Certificate of Correction Patent No. 2,438,259 March 23, 1948 ARTHUR STOLL ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Column 4, line 46, list of references cited, for Aug. 17, 1930 read Aug. 17, 1937";

and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the casein the Patent Office. Signed and sealed this 24th day of January, A. D. 1950.

[SEAL] THOMAS F. MURPHY,

Assistant Gommissz'oner of Patents. 

